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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $3,378,166 | 3,446 | 15,719 |
| 2006 | $3,490,048 | 3,616 | 15,168 |
| 2007 | $3,859,067 | 5 | 23,831 |
| 2008 | $3,888,534 | 2 | 12,918 |
| 2009 | $1,973,566 | 4 | 18,993 |
| 2010 | $1,799,659 | 1 | 7,621 |
| 2011 | $1,989,891 | 2 | 11,167 |
Note: Quantity represents Weight in carats
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